OpenBSD
((defined(__OpenBSD__) && OpenBSD < 201510)) || \
* Adjusted for OpenBSD, not available
ver |= (uint64_t)OpenBSD << MSR_HV_GUESTID_VERSION_SHIFT;
static int openbsd = OpenBSD;
#define MINYEAR ((OpenBSD / 100) - 1) /* minimum plausible year */